MAX20408
Automotive 36V, 8A/10A Fully-Integrated Buck Converter with 10μA Quiescent Current and Dual-Phase Capability
Industry's First Integrated High Power Buck Converter Optimized for Dual Phase Operation
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Overview
Features and Benefits
- High-Power DC/DC Converter in Small Solution Size
- 3.0V to 36V Operating Input Voltage Range
- Integrated High-Side and Low-Side FETs
- 8A/10A Maximum Output Current
- 400kHz and 2.1MHz Fixed Frequency Options
- Fixed 2.5ms Soft-Start Time
- 34ns Minimum On Time
- Programmable 0.8V to 10V Output with 400kHz,0.8V to 6V Output with 2.1MHz, or Fixed Output Options
- ±1.8% Output Voltage Accuracy
- Symmetric and Balanced SUP and PGND Pinout Placement for Superior EMI Performance
- Thermally-Enhanced 3.5mm x 3.75mm, 17-Pin FC2QFN Package
- High Efficiency at All Load Range
- 10μA Quiescent Current in Skip Mode
- Up to 94.3% Efficiency at 12VIN/5VOUT/2.1MHz
- Up to 95.6% Efficiency at 12VIN/5VOUT/400kHz
- Dual-Phase Operation up to 20A Load Capability
- Frequency Synchronization Input/Output
- 180º Out-of-Phase Between Master and Slave
- Dynamic Current Sharing
- Robust for Automotive Environment
- Forced PWM and Skip-Mode Operation
- 99% Duty Cycle Operation with Low DropoutVoltage
- Supports 42V Load Dump
- Spread-Spectrum Option
- Power Good Indicator
- Overtemperature and Short-Circuit Protection
- -40°C to +125°C Automotive Temperature Range
- AEC-Q100 Qualified
- Scalable Power Solution
- Footprint Compatible with MAX20404/MAX20405/MAX20406
Product Details
The MAX20408/MAX20410 ICs are tiny synchronous buck converters with integrated high-side and low-side switches. The ICs are designed to deliver up to 8A/10A with wide input voltages range from 3V to 36V. Voltage quality can be monitored by observing the PGOOD signal. The MAX20408/MAX20410 can operate in dropout by running at 99% duty cycle making it ideal for automotive and industrial applications.
The MAX20408/MAX20410 offers programmable or fixed 3.3V/5V output voltage options. High switching frequency at 2.1MHz and 400kHz options allows for small external components, reduced output ripple, and guarantees no AM interference. FSYNC input programmability enables three modes for optimized performance: forced PWM mode, ski mode with ultra-low quiescent current, and synchronization to an external clock. The spread spectrum option minimizes EMI radiated emissions.
The MAX20408/MAX20410 also comes with dual phase capability allowing up to 20A designs. Two ICs can be configured as a master and a slave with dynamic current sharing and 180° out of phase operation.
The MAX20408/MAX20410 is available in a small 3.5mm x 3.75mm 17-pin FC2QFN package. They are pin to pin compatible with the MAX20404/MAX20405/MAX20406 (4 to 6A) family of products.
Applications
- Automotive ADAS and other safety critical applications
- Automotive High Power Sensor Fusion
- Automotive Infotainment Systems
- Distributed DC Power Systems
- Navigation and Radio Head Units
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Product Lifecycle
Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Documentation & Resources
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Buck Power Stage Design Equations8/19/2022
Tools & Simulations
EE-Sim Power® Tools
The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.
Design Resources
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Evaluation Boards
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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.